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Top 10 most difficult in DB

IdnrStarting numbersDifficulty
537820 (Super easy)
537720 (Super easy)
537640 (Super easy)
537520 (Super easy)
537420 (Super easy)
537320 (Super easy)
537240 (Super easy)
537140 (Super easy)
537020 (Super easy)
536940 (Super easy)